And why not? For years we’ve been warned about the looming danger of overpopulation: People jostling for space on a planet that’s busting at the seams and running out of oil, food, land, and everything else.

Last discusses the coming demographic disaster on CBS This Morning with Norah O’Donnell and Gayle King:

Population growth has been slowing for two generations. The world’s population will peak, and then begin shrinking, within the next 50 years. In some countries, it’s already started:

Japan will be half its current size by the end of the century.

In Italy, there are already more deaths than births every year.

China’s One-Child Policy has left that country without enough women to marry its men, not enough young people to support the country’s elderly, and an impending population contraction that has the ruling class terrified.

And all of this is coming (or more correctly, has come) to America, too.

Middle-class Americans have their own, informal one-child policy these days. And an alarming number of upscale professionals don’t even go that far—they have dogs, not kids.

In fact, if it weren’t for the wave of immigration we experienced over the last three decades, the United States would be on the verge of shrinking, too.

Last tells us that everything about modern life—from Bugaboo strollers to insane college tuition to government regulations—has pushed Americans in a single direction, making it harder to have children. And making the people who do still want to have children feel like second-class citizens.

What to Expect When No One’s Expecting explains why the population implosion happened and how it’s remaking culture, the economy, and politics both at home and around the world.

Last in a revealing, detail-rich radio interview regarding What to Expect When No One’s Expecting: